CN103963019A

CN103963019A - Handheld power tool

Info

Publication number: CN103963019A
Application number: CN201310047930.8A
Authority: CN
Inventors: 李成道; 张士松; 钟红风; 庞晓丽; 谢明健
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2013-02-06
Filing date: 2013-02-06
Publication date: 2014-08-06
Anticipated expiration: 2033-02-06
Also published as: CN103963019B

Abstract

The invention discloses a handheld power tool which comprises a first shell, a second shell, a motor, output shafts and a working assembly. The first shell is supported by the second shell; the motor is arranged in the first shell; the output shafts are arranged in the first shell and are used for outputting rotation power of the motor; the working assembly comprises at least two working chucks which are respectively connected with the output shafts; the first shell operably drives the output shafts to axially rotate relative to the second shell, and the axis of the first shell is perpendicular to the axes of the output shafts. The handheld power tool has the advantage that the working chucks can be conveniently alternately repositioned and operated.

Description

Hand-held power tool

Technical Field

The invention relates to a power tool, in particular to a handheld power tool.

Background

In the prior art, a power tool with two working chucks is usually provided with two output shafts, the two output shafts are driven by the same motor, one end of each output shaft is used as a transmission part for transmitting power from the motor, and the other end is used as an output part for connecting the working chucks. The two work chucks are usually provided as different types of work chucks for performing different functions, for example one work chuck is a drill chuck for drilling and the other work chuck is a screwdriver chuck for screwing. The advantage that the work chuck set up like this is that need not frequently dismantle and install the work chuck to different operating modes in work to can convenient operation, improve work efficiency.

For example, U.S. patent publication No. US4810916 discloses a hand-held power tool in which a motor drives two output shafts through a transmission gear, the two output shafts are respectively provided with a working chuck, one of which is a screwdriver chuck and the other is a drill chuck. The two working chucks are radially arranged on the output shaft at 180 degrees, and when the working chucks alternately work, an operator needs to switch the position of the holding operating handle so that the corresponding working chucks are aligned to an object to be processed.

In the prior art, the operation of alternately using the working chucks by switching the position of the holding operation handle is extremely inconvenient, and particularly, the switch for controlling the motor needs to be triggered while the handle is held. In addition, when one working chuck is driven by a motor to rotate in a working state, the other working chuck rotates at the same time, at the moment, if a sealing measure is adopted for the working chucks which do not work, an operator can be injured or the safety of other people is endangered, and in addition, a safety shield is additionally arranged on the machine shell, although the risk of injury can be reduced, for the operator, the safety shield needs to be detached and installed once every time the working chuck is replaced, so that the inconvenience is brought to the work, and the work efficiency is not improved.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a handheld power tool capable of conveniently performing position alternation operation on a working chuck.

In order to solve the above problems, the present invention provides a hand-held power tool including a housing having a first housing and a second housing supporting the first housing; a motor disposed in the first housing; an output shaft provided to the first housing for outputting a rotational power of the motor; the working component comprises at least two working chucks which are respectively connected to the output shaft; the first housing is operable to rotate the output shaft relative to the second housing about an axis that is perpendicular to the axis of the output shaft.

Preferably, the motor is vertically disposed within the first housing, and the axis is a motor axis.

Preferably, a clutch mechanism is arranged between at least one of the working chucks and the output shaft, the clutch mechanism includes a first clutch element connected with the at least one working chuck and a second clutch element connected with the output shaft, when the first clutch element is engaged with the second clutch element, the output shaft drives the at least one working chuck to rotate, and when the first clutch element is disengaged from the second clutch element, the output shaft does not drive the at least one working chuck to rotate.

The working chucks are arranged in the same plane. Preferably, the number of the working chucks is two, and the two working chucks are respectively connected to two ends of the output shaft.

Preferably, the second housing is provided with a receiving portion, and the working chuck can be alternatively received in the receiving portion.

Set up locking mechanism between first casing and the second casing, locking mechanism is including setting up in the first retaining member of first casing to and set up in the second retaining member of second casing, when first retaining member and second retaining member join in marriage and connect, locking mechanism is in locking state, and first casing is static for the second casing, and when first retaining member and second retaining member break away from, locking mechanism is in the release state, and first casing can rotate for the second casing relatively.

Preferably, a limiting mechanism is disposed between the first housing and the second housing, the limiting mechanism includes a first limiting member disposed on the first housing and a second limiting member disposed on the second housing, the first limiting member is selectively separated from or abutted to the second limiting member, when the first limiting member is separated from the second limiting member, the first housing can rotate within a range of 180 degrees relative to the second housing, and when the first limiting member is abutted to the second limiting member, the second housing prevents the first housing from rotating.

Preferably, a positioning mechanism is arranged between the first housing and the second housing, the positioning mechanism includes a first positioning element arranged on the first housing and a second positioning element arranged on the second housing, the first positioning element can be selectively separated from or engaged with the second positioning element, when the first positioning element is separated from the second positioning element, the working chuck is in a non-working position, and when the first positioning element is engaged with the second positioning element, at least one working chuck is in a working position.

The second shell comprises an operating handle, and a trigger device for controlling the motor is arranged on the operating handle. The hand-held power tool further includes an energy unit for supplying electric energy to the rotation of the motor, the energy unit being a battery pack detachably attached to the second housing. An electrically conductive device is disposed between the first housing and the second housing.

The invention has the beneficial effects that: the first shell can be in movable connection with the output shafts of the plurality of working chucks to rotate together relative to the second shell, so that the alternate operation of the positions of the working chucks is more convenient in the operation process; in addition, as the second shell is provided with the accommodating part, the working chuck in the non-working position is always in the safe position, so that the risk of injury is reduced; because set up positioning mechanism and limited mechanism between first casing and the second casing for the position of work chuck is by turns the structure more reliable, stable.

Drawings

The present invention is described in further detail below with reference to the attached drawings.

Fig. 1 is a front sectional view of a hand-held power tool according to a first embodiment of the present invention in a first state.

Fig. 2 is a front cross-sectional view of the hand held power tool of fig. 1 in a second state.

Fig. 3 is a cross-sectional view taken along the line a-a in fig. 1, when the spacing mechanism is in the first state, the first working jaw is in the working position and the second working jaw is in the non-working position.

Fig. 4 is a sectional view taken along the direction a-a in fig. 1, where the limiting mechanism is in the second state, and the first working head and the second working head are both in the non-working position.

Fig. 5 is a cross-sectional view taken along line a-a of fig. 1, with the spacing mechanism in the first state, the first work jaw in the inoperative position, and the second work jaw in the operative position.

Fig. 6 is a cross-sectional view taken along line B-B of fig. 1, showing the positioning mechanism in a first state.

Fig. 7 is a cross-sectional view taken along line B-B of fig. 1, with the positioning mechanism in a second state.

Fig. 8 is a cross-sectional view taken along line B-B of fig. 1, showing the locking mechanism in a locked state.

Fig. 9 is a cross-sectional view taken along line C-C of fig. 1, showing the latch mechanism in a released state.

Fig. 10 is a front sectional view of a power tool in a first state according to a second embodiment of the present invention.

Fig. 11 is a front sectional view of the power tool of the second embodiment of the present invention in a second state.

Wherein,

1.1' multifunctional electric drill 2, motor 4, output shaft

5. Motor shaft 6, battery pack 7 and trigger device

8. Switch 11, first housing 12, rotating part

12a, a projection 13, a second housing 13a, a support

13b, a holding portion 14, a receiving portion 14a, a first arm

14b, a second arm 15, a base 16, an electrical conduction device

16a, conductive strips 16b, wires 18, connecting arms

20. Transmission mechanism 22, planetary gear set 23 and transmission shaft

24.24' bevel gear set 25, first bevel gear 27, second bevel gear

31.31 'first work chuck 31a drill 33.33' second work chuck

33a screwdriver head 40, locking mechanism 41, elastic piece

42. Operation trigger 43, wrench 44, operation rod

45. Groove 50, positioning mechanism 51, steel ball

52. Spring 53, accommodating groove 60 and limiting mechanism

62. Dog 65, annular space 70, clutch mechanism

72. First end tooth 74, second end tooth

Detailed Description

The following detailed description and technical contents of the present invention are described with reference to the accompanying drawings, however, the accompanying drawings only provide references and explanations, and do not limit the present invention.

The power tool may be an electric hammer, an electric drill, an electric screwdriver, an impact drill, etc., and in two preferred embodiments of the power tool of the present invention, the power tool is a multifunctional electric drill, wherein fig. 1 to 9 illustrate a first preferred embodiment and fig. 10 to 11 illustrate a second preferred embodiment. It will be appreciated by those skilled in the art that other forms of power tool are suitable for use in both preferred embodiments of the invention. A first preferred embodiment will be described below with reference to fig. 1 to 9, taking a power tool as an example of a multi-function electric drill.

Referring to fig. 1 and 2, a multi-function electric drill 1 includes a housing, a power system, and a working portion driven by the power system. The power system includes a motor 2 housed within a housing. The working part comprises a working chuck and an output shaft 4 for transmitting the rotation of the power system to the working chuck. The housing includes a first housing 11 and a second housing 13 supporting the first housing 11.

In the present embodiment, the motor 2 is located in the first housing 11 and is disposed in the vertical direction, the motor 2 has the motor shaft 5 extending in the vertical direction, and the motor shaft 5 has the motor axis X1. The output shaft 4 is vertically arranged relative to the motor shaft 5, the output shaft 4 has an output shaft axis X2, and the two ends of the output shaft 4 are respectively provided with a working chuck, that is, the first working chuck 31 and the second working chuck 33 are radially and symmetrically connected to the two ends of the output shaft 4 at 180 degrees. Because first work chuck 31 and second work chuck 33 are located the coplanar and all set up on same output shaft 4 for need not to set up power grouping mechanism between motor 2 of multi-functional electric drill 1 and the output shaft 4, divide the power of motor 2 into two output shafts that drive first work chuck and second work chuck respectively, thereby simplified the structure of multi-functional electric drill 1 and the installation step in the production process, reduced multi-functional electric drill 1's cost. The first work chuck 31 is preferably a drill chuck for holding a drill bit 31a for drilling work; the second work chuck 33 is a chuck for holding a screwdriver bit 33a for screwing; the second workholding chuck 33 can also be provided as a hexagonal hole at the end of the output shaft 4 for receiving and holding the screwdriver bit 33a. The positions of the first work jaw 31 and the second work jaw 33 are operably alternated.

The second housing 13 includes a supporting portion 13a extending along the output shaft axis X2, and a holding portion 13b extending from the supporting portion 13a and forming an included angle with the supporting portion 13a, and the holding portion 13b and the supporting portion 13a form an obtuse angle of more than 90 degrees and less than 180 degrees. The grip 13b is provided with a switch 8 for controlling the motor 2, and the trigger 7 is provided on the grip 13a side for facilitating the operator to control the position of the switch 8. The multi-function drill 1 of the present embodiment is a dc power tool, and the energy unit for supplying energy for the rotation of the motor 2 is a rechargeable battery pack 6, and the battery pack 6 is detachably attached to the tip end portion housing of the grip portion 13b. The second housing 13 further comprises a base 15 for movably supporting the motor 2, the base 15 being located below the motor 2 and being connected to the end housing of the grip portion 13b by means of an extension arm 18. An electrical conduction means 16 is provided between the base 15 and the motor 2, which enables the energy of the battery pack 6 to be transferred to the motor 2. In the embodiment, the electrical conducting device 16 includes a flexible wire 16b disposed on the extension arm 18, and a conductive plate 16a electrically connected to the motor 2, the conductive plate 16a extends into the base 15, one end of the flexible wire 16b is connected to the conductive plate 16a, and the other end is disposed to be connected to the battery pack 6, so that when the battery pack 3 is connected to the second housing 13, an electrical connection is established between the motor 2 and the battery pack 2. Of course, the electric conduction device can also be provided with an annular conductive groove in the base, the motor is connected with a spherical conductive piece which is meshed with the conductive groove, and when the first shell drives the motor to rotate around the axis of the motor, the annular conductive piece rolls along the annular conductive groove, and meanwhile, good electric conduction can be kept. The electrical conduction device of the present invention is not limited to the illustrated form, and those skilled in the art can conceive of other alternative electrical conduction devices.

The supporting portion 13a includes a first arm 14a and a second arm 14b extending parallel to the output shaft axis X2, and the second arm 14b is located below the first arm 14a and movably coupled to the first housing 11 respectively. In order to ensure that the working chuck in the non-working position does not cause injury to the operator, a receiving portion 14 is provided between the first arm 14 and the second arm 14b, the receiving portion 14 is used for receiving the first working chuck 31 or the second working chuck 33 in the non-working position, and the first working chuck 31 and the second working chuck 33 can be alternatively received in the receiving portion 14. The first housing 11 is rotatably supported on the base 15 by the first arm 14 and the second arm 14b, that is, the first housing 11 is operable to rotate the output shaft 4 relative to the second housing 13 about a rotation axis perpendicular to the output shaft 4, which in this embodiment is the motor axis X1. The first and second workchucks 31, 33 are switchable between an operating position for machining a workpiece and a storage position for storing in the storage portion 14 by rotation of the output shaft 4 about the motor axis X1.

According to the idea of the invention, a transmission mechanism may or may not be arranged between the motor 2 and the output shaft 4 of the multifunctional electric drill 1. When no transmission mechanism is provided, the output of the motor 2 is directly transmitted to the output shaft 4. The transmission mechanism can be gear transmission, belt transmission and the like. In the present embodiment, the power system further includes a transmission mechanism 20 disposed between the motor 2 and the output shaft 4, and the motor 2 drives the output shaft 4, which is also disposed in the first housing 11, to rotate through the transmission mechanism 20. The transmission mechanism 20 is provided as a gear assembly including a planetary gear set 22 driven by the motor shaft 5, and a bevel gear set 24 driven in cooperation with the planetary gear set 22, wherein the planetary gear set 21 has a transmission shaft 23, and the bevel gear set 24 includes a pair of first bevel gears 25 disposed perpendicularly to the output shaft 4, and a single second bevel gear 27 disposed on the transmission shaft 23 and driven in mesh with the first bevel gears 25, respectively. Of course, other transmission means may be envisaged by the skilled person to perform a similar function, such as a pulley transmission or the like. The output shaft 4 of the present embodiment may also include a plurality of shafts, for example, a plurality of transmission mechanisms may be provided for transmitting the rotational power of the motor 2 to the plurality of output shafts on the same plane; a plurality of working chucks can be arranged through a plurality of output shafts, so that the functions and the purposes of the hand-held electric tool are more extensive.

In order to control the rotational movement of the first housing 11 relative to the second housing 13, in the embodiment of the present invention, the first housing 11 is provided so as to be rotatable 180 degrees relative to the second housing 13, and a stopper mechanism 60 is provided between the first arm 14a of the second housing 13 and the first housing 11 in order to prevent excessive rotation of the first housing 11.

Referring to fig. 3 to 5, the limiting mechanism 60 includes a first limiting member disposed on the first housing 11 and a second limiting member disposed on the second housing 13, the first limiting member can be selectively separated from or abutted to the second limiting member for interference, when the first limiting member is separated from the second limiting member, the first housing can rotate relative to the second housing, and when the first limiting member is abutted to the second limiting member for interference, the second housing prevents the first housing from rotating. The first positioning element in this embodiment is two stoppers 62 disposed on the first arm 14a, the two stoppers 62 are disposed opposite to each other by 180 degrees and protrude from the annular space 65 of the first arm 14a, the first housing 11 has a rotating portion 12 received in the annular space 65, and the rotating portion 12 has a protrusion 12a cooperating with the stopper 62 for stopping. The rotating portion 12 is able to rotate within the annular space 65, but is limited to rotation within 180 degrees defined by the stop 62. As shown in fig. 3, when the projection 12a abuts against one of the stoppers 62, the second housing 13 limits the first housing 11 from further rotating, and at this time, the limiting mechanism 60 is in the first state, the first working chuck 31 is in the working position, and the second working chuck 33 is in the non-working position, i.e., the storage position; the first housing 11 can be rotated further relative to the second housing 13 only in the direction indicated by the arrow in fig. 3. As shown in fig. 4, when the protrusion 12a is disengaged from one of the stoppers 62, the limiting mechanism 60 is in the second state, and both the first working head 31 and the second working head 33 are in the non-working position. As shown in fig. 5, when the projection 12a abuts against the other stop 62, the second housing 13 limits the first housing 11 from further rotating, and at this time, the limiting mechanism 60 is in the third state, the first working chuck 31 is in the non-working position, i.e., the accommodating position, and the second working chuck 33 is in the working position; the first housing 11 can be rotated further relative to the second housing 13 only in the direction of the arrow in fig. 5. Therefore, the rotation angle of the first housing 11 is limited to a range of 180 degrees with respect to the second housing 13 regardless of whether it is rotated clockwise or counterclockwise. Of course, according to the requirement, the person skilled in the art can also reset the rotation angle range of the limiting mechanism 60; the limiting mechanism can be replaced by other limiting modes.

Referring to fig. 6 and 7, a positioning mechanism 60 is disposed between the second arm 14b and the first housing 11, so as to alert the operator when the positions of the first working chuck 31 and the second working chuck 33 are interchanged. The positioning mechanism 50 includes a first positioning element disposed on the second arm 14b and a second positioning element disposed on the first housing 11, the first positioning element can be selectively separated from or engaged with the second positioning element, when the first positioning element is separated from the second positioning element, the working chuck is at the non-working position, and when the first positioning element is engaged with the second positioning element, at least one working chuck is at the working position. The first positioning member of the present embodiment includes a steel ball 51 and a spring 52 abutting against the steel ball 51, the second positioning member is a pair of receiving slots 53 disposed in the first housing 11, and the receiving slots 53 are disposed opposite to the first housing 11 by 180 degrees and correspond to the position of the steel ball 51. The first housing 11 is rotated clockwise or counterclockwise within 180 degrees with respect to the second housing 13 as indicated by the arrow in fig. 6. When the first housing 11 rotates relative to the second housing 13, the first housing 11 causes the steel balls 51 to compress the springs 52 against the force of the springs 52, and once one of the work chucks rotates to the working position or one of the work chucks revolves to the receiving position, the steel balls 51 automatically fall into and engage with the receiving grooves 53 under the elastic force of the springs 52, and the moment of engagement has a distinct gear sense, and even a "snap" sound can be generated to indicate to an operator that the work chuck has rotated to the position. According to the requirement of operation hand feeling, the first positioning piece can be arranged in two, namely two positioning pieces are arranged in the first shell 13 and are symmetrically distributed in the radial direction of 180 degrees, and when the working chuck rotates to a preset position, the first positioning piece and the second positioning piece are respectively positioned at meshing positions. Those skilled in the art will appreciate that the positioning mechanism may take many other forms and will not be described in detail herein.

Referring to fig. 8 and 9, a lock mechanism 40 is provided between the first housing and the second housing in order to control the rotational movement of the first housing relative to the second housing. The locking mechanism 40 is disposed between the first housing 11 and the second arm 14b of the second housing 13, and the locking mechanism 40 includes a first locking member disposed on the first housing 11 and a second locking member disposed on the second housing 13. As shown in fig. 8, when the first and second locking members are in the locked state, the first housing 11 is not freely rotatable with respect to the second housing 13. As shown in fig. 9, when the first and second locking members are in the release state, the first housing 11 can rotate relative to the second housing 13; in this embodiment, the first locking member is a fitting portion provided on the first housing 11, and the second locking member includes an operation trigger 42 provided on the second arm 14b, and an elastic member 41; wherein the operating trigger 42 has an axially extending operating rod 44 and a wrench part 43 connected to the operating rod 44 for manual operation, the operating rod 44 having two ends, the wrench part 43 being arranged perpendicularly to the operating rod 44, wherein the mating part is arranged as a recess 45; one end of the operating lever 44 is for engagement locking with the groove 45, and the other end is for abutting against the elastic member 41. In the locked state, the operating trigger 42 is locked in engagement with the recess 45 by the elastic member 41, so that the first housing 11 is prevented from rotating relative to the second housing 13, i.e., the first housing 11 is stationary relative to the second housing 13; when the operating trigger 42 is pulled to move axially against the resilient member 41 to disengage the recess 45, rotational movement of the first housing 11 relative to the second housing 13 is permitted. The arrangement position of the grooves 45 can correspond to the position of the working chucks, and the number of the grooves 45 can also be specifically arranged according to the number of the working chucks; in this embodiment, the number of the grooves 45 includes at least two, and the two grooves 45 are radially and symmetrically distributed at 180 degrees, so that when the first housing 11 is in the locking position, at least one of the working chucks is in the working position, and the other working chuck is in the accommodating position of the second housing 13.

When the operator desires to change the position of the first working chuck 31 and the second working chuck 32, the locking mechanism 40 is released by pulling the operating trigger 42 to disengage the locking mechanism from the first housing 11, the first housing 11 is held to rotate clockwise or counterclockwise about the motor axis X1 relative to the second housing 13, the positioning mechanism 50 indicates that the sound energy senses the rotation to the predetermined position, and the operating trigger 42 is released to reengage the locking mechanism with the first housing 11. The first housing 11 provided with the motor 2 in this embodiment extends in the vertical direction as a whole, and is located on the same side of the support portion 13a as the holding portion 13b, so that it can be used as an auxiliary handle of the multifunctional machine 1 during operation, i.e. an operator holds the holding portion 14b, i.e. the main handle, of the second housing 13 with one hand and holds the first housing 11, i.e. the auxiliary handle, with the other hand, so that the holding operation with both hands is more stable, and in addition, during the process of switching the working chuck, the first housing 11 is used as the auxiliary handle for rotation at this time and is also more convenient to hold. It will be appreciated by those skilled in the art that the locking mechanism may take many other forms and will not be described in detail herein.

Referring to fig. 10 and 11, a multi-function power drill 1' according to a second embodiment of the present invention has a similar structure to the multi-function power drill 1 according to the first embodiment, wherein the same structure can refer to the first preferred embodiment and will not be described herein again. The differences are explained below. In order to save the consumption of the electric energy of the multi-function electric drill 1 ', a clutch mechanism 70 is provided between the first working chuck 31 ' and the output shaft 4, so that the rotation of the output shaft 4 is transmitted to the first working chuck 31 ' only when the first working chuck 31 ' is in the working state, and the rotation transmission from the output shaft 4 to the first working chuck 31 ' is terminated when the first working chuck 31 ' is in the non-working state, thereby avoiding the consumption of the electric energy of the first working chuck when the first working chuck 31 ' is in the non-working state. The clutch mechanism 70 comprises a first clutch element connected to the first working jaw 31' and a second clutch element connected to the output shaft 4. The clutch mechanism 70 has a first state and a second state, when the first working chuck 31 ' is subjected to a force along the axial direction of the output shaft 4, the clutch mechanism 70 is in the first state, the first clutch element is engaged with the second clutch element, and the clutch mechanism 70 allows the output shaft 4 to transmit rotation to the first working chuck 31 ', and the output shaft 4 can drive the first working chuck 31 ' to rotate. When the first working chuck 31 'is not acted by the force along the axial direction of the output shaft 4, the clutch mechanism 70 is in the second state, and when the first clutch element is separated from the second clutch element, the clutch mechanism 70 interrupts the output shaft 4 to transmit the rotation to the first working chuck 31', and the output shaft cannot drive the working head to rotate. Preferably, the first work chuck 31' is a drill chuck. The second working head 33' is provided as a hexagonal hole at the end of the output shaft 4 for receiving and holding the screwdriver bit 33a.

In this embodiment, the first clutch element is a first end tooth 72 provided on the first working chuck and the second clutch element is a second end tooth 74 provided at the first end of the output shaft 4. When the first working jaw 31 ' is subjected to a force in the axial direction of the output shaft 4, the clutch mechanism 70 is in the first state, in which the first end teeth 72 and the second end teeth 74 are engaged with each other, and the clutch mechanism 70 allows the output shaft 4 to transmit rotation to the first working jaw 31 ', the output shaft 4 can drive the first working jaw 31 ' to rotate. When the first working chuck 31 ' is not acted by the force along the axial direction of the output shaft 4, the clutch mechanism 70 is in the second state, at this time, the first end teeth 72 and the second end teeth 74 are separated from each other, the clutch mechanism 70 interrupts the output shaft 4 to transmit the rotation to the first working chuck 31 ', and the output shaft 4 cannot drive the working head 31 ' to rotate. Those skilled in the art will appreciate that the clutch mechanism 70 may take many other forms and will not be described in detail herein. Preferably, the first work chuck 31' is a drill chuck. The transmission mechanism 20 includes a planetary gear set 22 and a bevel gear set 24 'coupled to each other, wherein the bevel gear set 24' includes only a first bevel gear 25 provided on the output shaft 4 and a second bevel gear 27 provided on the transmission shaft 23.

The above definitions of the various elements are not limited to the various specific configurations or shapes mentioned in the embodiments, and may be easily and commonly replaced by those skilled in the art. For example, the motor can be a gasoline engine or a diesel engine and the like to replace the motor; the clamping part of the working chuck can be arranged into a polygon with any regular cross section; furthermore, in the above-described embodiments, the rotary motion of the motor can drive different output shafts via a branch transmission, for example, the output shafts can be parallel to each other or angled to each other in the same plane, and the output shafts can be provided with working chucks for performing different functions.

Claims

1. A hand-held power tool, characterized in that the hand-held power tool comprises:

a case having a first case and a second case supporting the first case;

a motor disposed in the first housing;

an output shaft provided to the first housing for outputting a rotational power of the motor;

the working component comprises at least two working chucks which are respectively connected to the output shaft;

the first housing is operable to rotate the output shaft relative to the second housing about an axis that is perpendicular to the axis of the output shaft.

2. The hand-held power tool of claim 1, wherein: the motor is vertically arranged in the first shell, and the axis is a motor axis.

3. The hand-held power tool of claim 1, wherein: and when the first clutch element is meshed with the second clutch element, the output shaft drives the at least one working chuck to rotate, and when the first clutch element is separated from the second clutch element, the output shaft does not drive the at least one working chuck to rotate.

4. The hand-held power tool of claim 1, wherein: the working chucks are arranged in the same plane.

5. The hand-held power tool of claim 1 or 4, wherein: the number of the working chucks is two, and the two working chucks are respectively connected to two ends of the output shaft.

6. The hand-held power tool of claim 5, wherein: the second shell is provided with an accommodating part, and the working chuck can be alternatively accommodated in the accommodating part.

7. The hand-held power tool of claim 1, wherein: set up locking mechanism between first casing and the second casing, locking mechanism is including setting up in the first retaining member of first casing to and set up in the second retaining member of second casing, when first retaining member and second retaining member join in marriage and connect, locking mechanism is in locking state, and first casing is static for the second casing, and when first retaining member and second retaining member break away from, locking mechanism is in the release state, and first casing can rotate for the second casing relatively.

8. The hand-held power tool of claim 1, wherein: the limiting mechanism is arranged between the first shell and the second shell and comprises a first limiting part and a second limiting part, wherein the first limiting part is arranged on the first shell, the second limiting part is arranged on the second shell, the first limiting part can be selectively separated from or abutted to the second limiting part, when the first limiting part is separated from the second limiting part, the first shell can rotate in a range of 180 degrees relative to the second shell, and when the first limiting part is abutted to the second limiting part, the second shell prevents the first shell from rotating relative to the second shell.

9. The hand-held power tool of claim 1, wherein: set up positioning mechanism between first casing and the second casing, positioning mechanism is including setting up in the first setting element of first casing to and set up in the second setting element of second casing, first setting element is optional to be separated or mesh with the second setting element, and when first setting element and second setting element separation, the work chuck is in inoperative position, and when first locating element and second setting element meshing, at least one work chuck is in operative position.

10. The hand-held power tool of claim 1, wherein: the hand-held power tool further includes an energy unit for supplying electric energy to the rotation of the motor, the energy unit being a battery pack detachably attached to the second housing.